Annular laser gyroscope inertial navigation system and power panel damping device thereof

Abstract

The vibration damper comprises an annular rubber pad and a stainless steel ring group, the stainless steel ring group comprises an inner steel ring and an outer steel ring, the outer steel ring is sleeved outside the inner steel ring and movably connected with the inner steel ring, the inner steel ring is sleeved outside the annular rubber pad, and the inner steel ring, the annular rubber pad and the outer steel ring are coaxially arranged. The bottom face of the annular rubber pad is flush with the bottom face of the outer steel ring to form a mounting face, the top face of the annular rubber pad is higher than the top face of the outer steel ring, the inner steel ring can move up and down relative to the outer steel ring till the inner steel ring is located at a first limit position or a second limit position, and when the inner steel ring is located at the first limit position, the top face of the inner steel ring is lower than the top face of the uncompressed annular rubber pad. When the inner steel ring is located at the second limiting position, the top face of the inner steel ring is flush with the top face of the outer steel ring. The device disclosed by the utility model is simple in structure, and the vibration reduction effect can be accurately adjusted so as to meet the vibration reduction requirements of different annular laser gyroscope inertial navigation.

Description

Technical Field

[0001] The utility model relates to a vibration reduction technology for a laser gyro inertial navigation system, and more specifically to a ring laser gyro inertial navigation system and a vibration reduction device for a power supply board thereof. Background Art

[0002] The ring laser gyro inertial navigation system is a navigation technology based on the principle of optical gyroscope. It uses a ring laser gyro to measure the angular velocity of rotation to determine the direction and position of the navigation device. The ring laser gyro inertial navigation system has the characteristics of high precision, high stability and strong anti-interference ability. It is widely used in navigation and positioning tasks in the fields of aerospace, ocean, underground detection, missile guidance, etc. It can provide accurate attitude, angular velocity and position information, providing important data support for the navigation system. However, the power module on its power board is easily affected by the vibration of the gyro during operation and causes high-order resonance, which affects the stability and accuracy of the system.

[0003] At present, inertial navigation products tend to be miniaturized, and the installation space is very limited. The rubber shock absorbers on the market are mainly used for overall vibration reduction, which are not suitable in size. In addition, the cost of purchasing such a precise shock absorber is high, and the vibration reduction effect is average. Therefore, it is necessary to design a simple vibration reduction device to reduce vibration transmission and improve the stability and accuracy of the system.

[0004] In addition, different ring laser gyro inertial navigation systems have different assembly errors and corresponding vibration reduction requirements. Therefore, it is necessary to design a vibration reduction device that can accurately adjust the vibration reduction effect to adapt to the vibration reduction requirements of different ring laser gyro inertial navigation systems. Utility Model Content

[0005] In view of the problems in the background technology, the utility model proposes a vibration reduction device for a power board of a ring laser gyro inertial navigation system, which can accurately adjust the vibration reduction effect to meet the vibration reduction requirements of different ring laser gyro inertial navigation systems.

[0006] The utility model provides a ring laser gyro inertial navigation system power board vibration reduction device, comprising:

[0007] An annular rubber pad and a stainless steel ring group, the stainless steel ring group includes an inner steel ring and an outer steel ring, the outer steel ring is sleeved on the outside of the inner steel ring and the two are movably connected, the inner steel ring is sleeved on the outside of the annular rubber pad, the three are concentric, the bottom surfaces of the annular rubber pad and the outer steel ring are flush and form a mounting reference surface, the height of the top surface of the annular rubber pad relative to the mounting reference surface is greater than the height of the top surface of the outer steel ring relative to the mounting reference surface, the inner steel ring can move up and down relative to the outer steel ring until it is located at a first extreme position or a second extreme position, when the inner steel ring is in the first extreme position, the height of its top surface relative to the mounting reference surface is less than the height of the top surface of the uncompressed annular rubber pad relative to the mounting reference surface, and the height of its top surface relative to the mounting reference surface is greater than the height of the top surface of the outer steel ring relative to the mounting reference surface, when the inner steel ring is in the second extreme position, its top surface is flush with the top surface of the outer steel ring.

[0008] Optionally, the inner steel ring and the outer steel ring are threadedly connected.

[0009] Optionally, when the annular rubber pad is not compressed, the height difference between its top surface and the top surface of the outer steel ring is between 0.2 and 0.5 mm.

[0010] Optionally, the center of the annular rubber pad can be penetrated by a fastening screw.

[0011] The utility model also provides a ring laser gyro inertial navigation system, including a platform, a power board and fastening screws, the top surface of the power board is provided with the above-mentioned power board vibration reduction device, and the fastening screws pass through the ring rubber pad, the power board and the platform in sequence to fix the power board to the platform.

[0012] Optionally, the above-mentioned power board vibration reduction device is also provided between the power board and the table body, and the fastening screws pass through the annular rubber pad on the top surface of the power board, the power board, the annular rubber pad between the power board and the table body, and the table body in sequence to fix the power board to the table body.

[0013] Optionally, the power board vibration reduction device on the power board and the power board vibration reduction device between the power board and the platform are provided with multiple groups, and the multiple groups of power board vibration reduction devices are evenly distributed along the circumferential direction of the power board.

[0014] The utility model discloses a ring laser gyro inertial navigation system power board vibration reduction device, which can control the compression amount of the ring rubber pad by adjusting the height of the inner steel ring relative to the outer steel ring, thereby accurately adjusting the vibration reduction effect to meet the vibration reduction requirements of different ring laser gyro inertial navigation systems.

[0015] In addition, the device has a simple structure, which can greatly reduce vibration transmission and improve the stability and accuracy of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the present invention more easily understood, the present invention will be described in more detail by referring to the specific embodiments shown in the accompanying drawings. These drawings only depict typical embodiments of the present invention and should not be considered as limiting the scope of protection of the present invention.

[0017] Figure 1 The figure shows a three-dimensional view of the vibration reduction device of the present invention in an unlocked state.

[0018] Figure 2 The figure shows a cross-sectional view of the vibration reduction device of the present invention when it is in the first state and unlocked.

[0019] Figure 3 The figure shows a cross-sectional view of the vibration reduction device of the utility model when it is in the first state and locked.

[0020] Figure 4 The figure shows a cross-sectional view of the vibration reduction device of the present invention when it is in the second state and is not locked.

[0021] Figure 5 The figure shows a cross-sectional view of the vibration reduction device of the utility model when it is in the second state and locked.

[0022] Figure 6 Shown is a schematic diagram of a first application of the vibration reduction device of the utility model.

[0023] Figure 7 Shown is a cross-sectional view of a second application situation of the vibration reduction device of the utility model (in the first state and locked).

[0024] Figure 8 Shown is a cross-sectional view of a second application situation of the vibration reduction device of the utility model (in the second state and locked).

[0025] Reference numerals

[0026] 1. Screws; 2. Spring washers; 3. Flat washers; 4. Ring-shaped rubber washers; 5. Stainless steel rings; 51. Inner steel rings; 52. Outer steel rings; 6. Power board; 7. Platform. DETAILED DESCRIPTION

[0027] The following describes the implementation mode of the present invention with reference to the accompanying drawings, so that those skilled in the art can better understand the present invention and implement it. However, the enumerated embodiments are not intended to limit the present invention. In the absence of conflict, the following embodiments and the technical features in the embodiments can be combined with each other, wherein the same components are represented by the same figure marks.

[0028] like Figure 1-5 As shown, the vibration reduction device of the utility model comprises: an annular rubber pad 4 and a stainless steel ring group 5.

[0029] The stainless steel ring group 5 includes an inner steel ring 51 and an outer steel ring 52. The outer steel ring 52 is sleeved on the outside of the inner steel ring 51 and the two are threadedly connected. The inner steel ring 51 is sleeved on the outside of the annular rubber pad 4. The three are concentric. The bottom surfaces of the annular rubber pad 4 and the outer steel ring 52 are flush and form a mounting reference surface. The height of the top surface of the annular rubber pad 4 relative to the mounting reference surface is greater than the height of the top surface of the outer steel ring 52 relative to the mounting reference surface. The inner steel ring 51 can move up and down relative to the outer steel ring 52 until it is located at the first extreme position or the second extreme position. When the inner steel ring 51 is in the first extreme position, the height of its top surface relative to the mounting reference surface is less than the height of the top surface of the uncompressed annular rubber pad 4 relative to the mounting reference surface, and the height of its top surface relative to the mounting reference surface is greater than the height of the top surface of the outer steel ring 52 relative to the mounting reference surface. When the inner steel ring 51 is in the second extreme position, its top surface is flush with the top surface of the outer steel ring 52.

[0030] Therefore, by adjusting the height of the inner steel ring 51 relative to the outer steel ring 52, the compression amount of the annular rubber pad 4 can be controlled, so as to accurately adjust the vibration reduction effect to meet the vibration reduction requirements of different ring laser gyro inertial navigation systems.

[0031] Taking into account the viscoelastic properties of the rubber itself, when the annular rubber pad is not compressed, the height difference between its top surface and the top surface of the outer steel ring should be between 0.2 and 0.5 mm.

[0032] When in use, the vibration reduction device is located on the power board, and the locking screw passes through the center of the vibration reduction device (i.e., the center of the annular rubber pad 4) to limit the position and prevent the annular rubber pad 4 from being infinitely compressed. When in use, the screw gasket is pressed on the annular rubber pad 4, and the height of the inner steel ring 51 relative to the outer steel ring 52 is adjusted first, and then the locking screw is rotated to compress the annular rubber pad 4 until its top surface is at the same height as the top surface of the inner steel ring 51, and the locking work is completed.

[0033] Preferably, a pair of vibration reduction devices can be used in use, that is, the first application of the vibration reduction device of the utility model, such as Figure 6 As shown. When the power board (PCB board) 6 and the platform 7 ( Figure 6 When fixing the power board 6 (not shown), the vibration reduction device of this embodiment is added between the washer of the screw 1 (M3 hexagon socket pan head screw) and the power board 6. If only the annular rubber pad 4 is added between the washer of the screw 1 (M3 hexagon socket pan head screw) and the power board 6, when the pre-tightening force is insufficient, it will not play a limiting role. When the pre-tightening force is too large, the rubber pad will be infinitely compressed and will not play a vibration reduction role.

[0034] like Figure 2 As shown, the bottom surface of the annular rubber pad 4 is flush with the bottom surface of the outer steel ring 52, and the inner steel ring 51 is in the first limit position relative to the outer steel ring 52. When the flat pad 3 is pressed on the annular rubber pad 4, the upper surface of the annular rubber pad 4 is compressed, as shown in FIG. Figure 3The annular rubber pad 4 is compressed to the limit state. If the screw 1 is tightened continuously, the annular rubber pad 4 will not be further compressed. Figure 4 As shown, the inner steel ring 51 is in the second extreme position relative to the outer steel ring 52. At this time, the top surface of the inner steel ring 51 is flush with the top surface of the outer steel ring 52. When the flat pad 3 is pressed on the annular rubber pad 4, the upper surface of the annular rubber pad 4 is compressed. Figure 5 As shown, the annular rubber pad 4 is compressed to the limit state. At this moment, the screw is continuously tightened, and the annular rubber pad 4 will not be further compressed.

[0035] The purpose of this structural design is to design a highly adjustable rubber vibration damping device for adjusting the compression of the vibration damping pad (compression 20%-50%), so as to obtain the best vibration damping effect of the product.

[0036] For this purpose, two vibration reduction devices can be used, that is, the second application of the vibration reduction device of the utility model, such as Figure 7 and Figure 8 As shown, one vibration damping device is located between the power board 6 and the platform 7, and the other vibration damping device is located between the power board 6 and the gasket of the screw 1 (including the spring washer 2 and the flat washer 3), and the middle is locked and fixed by the screw 1. Figure 7 The figure shows the locking state of the vibration damping device of the utility model after the pre-tightening force is applied in the first state. It can be seen that the annular rubber pads 4 of the two vibration damping devices are compressed. After compression, the top surface of the annular rubber pad 4 is flush with the top surface of the inner steel ring 51, which plays a vibration reduction role. Figure 8 It shows the locking state of the vibration damping device of the utility model after the vibration damping device is in the second state and the preload force is applied. It can be seen that the annular rubber pads 4 of the two vibration damping devices are compressed. After compression, the top surface of the annular rubber pad 4, the top surface of the inner steel ring 51 and the top surface of the outer steel ring 52 are flush, which plays a vibration reduction role.

[0037] The utility model of the ring laser gyro inertial navigation system power board vibration reduction structure can effectively reduce the vibration amplitude of the power board and improve the stability and accuracy of the system. The use of the ring rubber pad can alleviate the vibration of the power board and reduce the vibration amplitude; the setting of the stainless steel ring can play a limiting role to prevent the rubber pad from separating from the gasket during vibration and not achieving the vibration reduction effect. The combination of the two can effectively solve the resonance problem of the power board.

[0038] The embodiments described above are only preferred specific implementations of the present invention. The phrases "in one embodiment", "in another embodiment", "in yet another embodiment" or "in other embodiments" used in this specification may refer to one or more of the same or different embodiments according to the present disclosure. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A vibration reduction device for a power board of a ring laser gyro inertial navigation system, characterized in that: include: An annular rubber pad and a stainless steel ring group, the stainless steel ring group includes an inner steel ring and an outer steel ring, the outer steel ring is sleeved on the outside of the inner steel ring and the two are movably connected, the inner steel ring is sleeved on the outside of the annular rubber pad, the three are coaxially arranged, the bottom surfaces of the annular rubber pad and the outer steel ring are flush and form a mounting reference surface, the height of the top surface of the annular rubber pad relative to the mounting reference surface is greater than the height of the top surface of the outer steel ring relative to the mounting reference surface, the inner steel ring can move up and down relative to the outer steel ring until it is located at a first extreme position or a second extreme position, when the inner steel ring is in the first extreme position, the height of its top surface relative to the mounting reference surface is less than the height of the top surface of the uncompressed annular rubber pad relative to the mounting reference surface, and the height of its top surface relative to the mounting reference surface is greater than the height of the top surface of the outer steel ring relative to the mounting reference surface, when the inner steel ring is in the second extreme position, its top surface is flush with the top surface of the outer steel ring.

2. The power board vibration reduction device according to claim 1, characterized in that: The inner steel ring and the outer steel ring are threadedly connected.

3. The power board vibration reduction device according to claim 1, characterized in that: When the annular rubber pad is not compressed, the height difference between its top surface and the top surface of the outer steel ring is between 0.2 and 0.5 mm.

4. The power board vibration reduction device according to claim 1, characterized in that: The center of the annular rubber pad can be penetrated by a fastening screw.

5. A ring laser gyro inertial navigation system, comprising a platform, a power board and fastening screws, characterized in that: The top surface of the power board is provided with a power board vibration reduction device as described in any one of claims 1 to 4, and the fastening screws pass through the annular rubber pad, the power board and the platform in sequence to fix the power board to the platform.

6. The ring laser gyro inertial navigation system according to claim 5, characterized in that: A power board vibration reduction device as described in any one of claims 1 to 4 is also provided between the power board and the table body, and the fastening screws pass through the annular rubber pad on the top surface of the power board, the power board, the annular rubber pad between the power board and the table body, and the table body in sequence to fix the power board to the table body.

7. The ring laser gyro inertial navigation system according to claim 6, characterized in that: There are multiple groups of power board vibration reduction devices on the power board and between the power board and the platform, and the multiple groups of power board vibration reduction devices are evenly distributed along the circumferential direction of the power board.

Images